Ventilating apparatus.



W. D. SCOTT. VENTILATING APPARATUS. APPLIGATION FILED 11110.31, 1912. nuwnn JAN.28,1914.

zJ BY ATTDRNEY WITN EEEE:

WILLIAM D. SCOTT, 0F MARTINS FERRY, OHIO.

VENTILATING APPARATUS.

incienso.

Specification of Letters Patent.

Patented Mar. 17, 1914.

Application filed December 31, 1912, Senal No. 739,541. Renewed January 28, 1914. Seria1 No. 815,097.

To all Lc/rom, fit may concern:

Be it known that I, WILLIAM D. Soo'rr, a citizen of the United States of America, and resident of Martins Ferry, county of Beh mont, and State of Ohio, have invented certain new and useful Improvements in Ventilating Apparatus, of which the following is a specification.

This invention relates broadly to ventilating apparatus, and specifically to a fan for producing a circulation of air in mines.

The primary object of the invention is to provide a Ventilating apparatus which has a maximum capacity for gathering and delivering air and which is specially adapted for forcing air throughout the passages of mines.

A further object is to structurally improve that class of fans employed for Ventilating purposes, providing a device wherein the resistance offered by the air is reduced to a minimum and which, consequently, with a given driving power, possesses greatly increased efficiency.

lVith these and other objects in view the invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be exemplified, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a view, partly in front elevation 4and partly in section, illustrating the invention; Fig. 2 is a central vertical transverse section through the easing; and Fig. 3 is a detail section taken on the line 3-3, Fig. 1.

Referring to said. drawings, in which like designating characters distinguish like parts throughout the several views 1 indicates a rectangular easing the outer or rear face 2 of which has therein a central circular airintalie opening 3 of suitable size or area, while the front of the casing is entirely open, as shown, to permit of the free and unob structed delivery of air. Extended centrally through the casing is a shaft 4t which is journaled in bearings 5 carried by stationary supports G located in front of and at the rear of the casing.

Fixed upon the shaft -1- within the casing is a hub 7 havingradial arms 7 upon which are mounted a plurality of fan blades S. Each blade is substantially semi-circular in form and is disposed upright with respect to the hub and has its straight chord-like edge crossing said hub in a diagonal direction, as is clearly shown :in Fig. 2. Said blades are so disposed or spaced with respect to each other that a substantially circular fan is constituted thereby and located wholly within the contines of the casing.

Intel-posed horizontally between and bolted to adjacent portions of adjacent blades near the peripheral edges of the latter is a plurality of radially inclined transverse blades 9, as is clearly shown in Fig. 2.

In operation, the rapidly rotating blades S produce a powerful suction for drawing air through the intake opening 3 and force said air forward through the open front of the casing. In a plain rectangular or cylindrical casing, however, said blades would necessarily encounter, and would be obliged to overcome, a great resistance due to air becoming compressed between the blades and the casing f'alls as it is forced outward from the center. Therefore, in order to relieve the compression and to practically eliminate this resistance, and at the same time to increase the volume of air supplied by the fan, means is provided for releasing the air carried to the circumference of the fan, said means including pockets 10 formed within the corners of lthe casing by the provision of arcuately curved plates 11, each of which is attached at one end to the casing wall and at its opposite end to braces 12 mounted upon the casing walls. Said braces serve to support the rearmost ends of said plates a short distance from said walls for forming entrance passages 13 through which air forced to the periphery of the blades is driven into the said pockets 10. Mounted on the outer side of the casing adjacent to the position occupied by each pocket 10 and having open communication with said pocket through an opening or passage 14 provided in the casing wall is a receptacle 15, open at its front, as shown at the right side of Fig. 1, for receiving the air from said pocket and for directing the same forward in the direction of the blast delivered directly from the bla des S.

As is obvious, the rapidly rotating fan drives the greater portion of the air directly forward in an axial direction; and such air as is forced laterally to the outer ends ofthe blades is caught by the transverse blades 9 and is driven through the passages 13 into the pockets 10, thence through the openings 14 into the receptacles 15, from whence it is directed forward to join with the air delivered directly from the fan, as aforesaid.

The plates 11 and those portions of the casing walls located between adjacent ends of adjacent plates together'constitute a substantially cylindrical chamber within which the fan operates.

The air-inletI opening 8 is concentric with the fan and chamber and is of relatively less diameter. Thus, as is apparent, the air entering through said opening is received by the fan near its center, and the greater portion thereof consequently never passes to the periphery of the fan, but is delivered directly therefrom in a forward axial direction.

`While I have described my invention more or less in detail, it is obvious that various changes in the form and arrangement of some of the parts may be resorted to without departing from the general spirit or scope of the invention as defined in the appended claims. Hence l am not to be understood as limiting myself to the precise construction herein shown and described.,

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A Ventilating apparatus comprising a rotatable fan adapted for forcing air in an axial direction, a cylindrical chamber within which said fan is located, said chamber having its front end open to permit the unobstructed delivery of air from the fan and having in its rear end an air inlet opening of less diameter than the fan and concentric therewith, a plurality of air-outlet passages leading laterally from said chamber, and means whereby air forced through said passages is directed forward with the air delivered directly from the fan.

2. A Ventilating apparatus comprising a,

rotatable fan adapted for forcing air in an axial direction, a cylindrical chamber within which said .fan is located, said chamber having its front end open to permit the unobstructed delivery of air from the fan and having in its rear end an air inlet opening of less diameter than the fan and concentric therewith, a plurality of pockets located laterally of said chamber, airoutlet passages leading from said chamber to said pockets, and means whereby air delivered to said pockets is directed forward to join with the air delivered directly from the fan.

3.. A ventilating apparatus comprising a substantially rectangular casing having its front face open and having an air-inlet opening in its rear face, a rotatable fan located within said casing and adapted to force air in an axial direction., a-rcuately curved plates disposed across the corners of said casing, forming pockets in said corners and a substantially cylindrical fan inclosing chamber, passages leading from said chamber to said pockets, and means for directing air from said pockets in a forward axial direction,

4. A ventilating apparatus comprising a substantially rectangular casing having its front face open and having an air-inlet opening in its rear face, a rotatable fan located within said casing and adapted to force air in an axial direction, arcuately curved plates disposed across the corners of said casing, forming pockets in said corners and a substantially cylindrical fan inclosing chamber, passages leading from said chamber to said pockets, and air-conducting receptacles located without said casing and in open communication with said pockets, whereby air received in said pockets is directed forward in an axial direction.

5. In a ventilating apparatus, a rotatable shaft; a fan mounted 0n said shaft, said fan comprising a plurality of semi-circular blades disposed in upright radial position with respect to said shaft and having their straight chord-like edges diagonally crossing said shaft and extending approximately equal distances on opposite sides thereof; a casing inclosing the periphery of said fan and having its front face open for the free delivery of air from the fan in an axial vdirection; a cent-ral air-intake opening in the rear face of said casing and concentric with said fan; a plurality'of passages leading through the side walls of said casing, and means whereby air forced through said passages is directed forward in said axial direction.

6. In a ventil'ating apparatus, a rotatable shaft; a fan mounted on said shaft, said fan comprising a plurality of semi-circular blades disposed in upright radial position with respect to said shaft and having their straight chord-like edges diagonally crossing said shaft and extending approximately equal distances on opposite sides thereof,

transverse blades disposed between adjacent diagonal blades adjacent to the outer ends 03E the latter; a casing inclosing the periphery oil.l said fan and havingits front tace open for the free delivery oit' air from the fan inan axial direction; a central airinlake opening in the rear face of said easing and concentric with Said fan; a plurality oit' passages leading through the side 'walls of said casing, and means whereby aii lfnced through said passages is delivered .in 10 the direction of the direct delivery oi air from the fan.

In testimony whereof, I allix my signature in presence ol two subscribing witnesses.

WILLIAM D. SCOTT. Witnesses:

II. I". Dimmi, L. D. Monms.

Copies of this patent may 'be obtained for ve cents each, by addressing the Commissioner of Patents,

. Washington, D. C. 

